Ultrasonic bat detectors: a beginners' guide

Abstract

This article explains that microchiropteran bats have evolved a system of echolocation based on ultrasound. Bats' echolocation calls can be rendered audible to humans using ultrasonic detectors. The principles of ultrasonic detection ore explained and the opportunities for fieldwork highlighted. Guidelines are offered on the best times and pieces to study flying bats and safety considerations. Species identification and roost location tips are given, and techniques for investigating aspects of ecology and behaviour ore outlined. The Appendix provides information on bat detector manufacturers and sources of advice on bats.